package 集合.day3.demo4;

import java.util.TreeMap;
import java.util.TreeSet;

public class Test4 {
    public static void main(String[] args) {
        TreeSet ts=new TreeSet();
        ts.add("ddd");
        TreeMap m=new TreeMap();
        m.put("333","afd");
        m.put("222","bbb");
        m.put("111","ccc");
        System.out.println(m);
    }
}
